干旱区生态环境知识资源中心(Arid): 聚丙烯酸钾对土壤孔隙及含水特性的影响

Arid

	聚丙烯酸钾对土壤孔隙及含水特性的影响
其他题名	Effect of potassium polyacrylate on soil porosity and moisture characteristics
	杨彦明 1; 刘景辉 1; 李立军 1; 赵宝平 1; 车永强 2; 乌恩 2
来源期刊	中国土壤与肥料
ISSN	1673-6257
出版年	2015
期号	4 页码:28-35
中文摘要	长城沿线地处我国北方干旱、半干旱区,常年因春旱缺墒造成的播种难、出苗难、保苗难问题严重。试验利用土柱人工模拟干旱环境,通过施用不同量聚丙烯酸钾(K-PAM)来改善土壤孔隙与水分状况,并借助CT扫描技术为深入研究K-PAM蓄水保墒机制提供理论依据。试验设4个K-PAM用量(%,占土壤质量百分比),即0(CK)、0.02%(A)、0.06%(B)、0.10%(C)。结果表明:施用K-PAM可增加0~10 cm土层孔隙总数,从各级等效直径孔隙看,各土层1.0~2.0 mm孔隙数量最多。随着K-PAM用量增加,各级孔隙数量呈先增加、后减少的变化趋势,且以中等用量0.06%(B)表现最佳。随着苗期推进、持续干旱下各处理0~10 cm土壤紧实度在出苗6~7 d后开始不断增大,A、B、C、CK处理紧实度最高分别可达1 632.8、1 944.3、2 198.5、1 400.7 kPa;K-PAM用量小于0.06%时,可使苗期0~10 cm土层含水量较其它处理增加。用量大于0.06%时,0~10 cm土层含水量较其它处理降低;干旱条件下,低用量K-PAM处理更有利于出苗数量增加。可见,确定合理K-PAM用量是发挥K-PAM蓄水保水优势,增加出苗率、获得高产的关键。
英文摘要	The agricultural excessive dependence on rainfall.Drought is a serious problem for agriculture in arid,semi-arid region northern of China such as regions along the Great Wall,which could lead to difficult emergence and seedling planting problems.In this study,soil columns were used to simulate drought environment artificially,different rates of K-PAM were applied to improve the soil pore and water content,and CT techniques was used.This research aimed to provide a theoretical basis for the water conservation.4 K-PAM application,0(CK),0.02% (A),0.06% (B),0.10%(C)were set in this experiment.The results show that:The K-PAM increased the soil pore number in 0~10 cm.1.0~2.0 mm pore number was the dominate pore equivalent diameter in all layers of each soil.With the increasing of K-PAM application rate,the various pore number increased first,then decreased,and it was the highest in the treatment B.The soil compaction in 0~10 cm after the emergence 6~7 d difference increased gradually in drought condition with the seedling growth,and reached 1 632.8,1 944.3,2 198.5,1 400.7 kPa for treatment A,B,C,CK,respectively.When the application of K-PAM was less than 0.06%,soil water content was higher than that of other treatments in 0~10 cm soil layer.In dry conditions,low application of K-PAM was more helpful to emergence.It was concluded that reasonable application of K-PAM could be useful for water conservation and improve the rate of emergence and yield.
中文关键词	聚丙烯酸钾 ; 土壤孔隙 ; 土壤含水特性
英文关键词	K-PAM soil porosity soil water character
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:5496580
来源机构	内蒙古农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/233824
作者单位	1.内蒙古农业大学农学院, 呼和浩特, 内蒙古 010019, 中国; 2.鄂尔多斯市植保植检站, 鄂尔多斯, 内蒙古 017000, 中国
推荐引用方式 GB/T 7714	杨彦明,刘景辉,李立军,等. 聚丙烯酸钾对土壤孔隙及含水特性的影响[J]. 内蒙古农业大学,2015(4):28-35.
APA	杨彦明,刘景辉,李立军,赵宝平,车永强,&乌恩.(2015).聚丙烯酸钾对土壤孔隙及含水特性的影响.中国土壤与肥料(4),28-35.
MLA	杨彦明,et al."聚丙烯酸钾对土壤孔隙及含水特性的影响".中国土壤与肥料 .4(2015):28-35.